{"title":"Antenna switching for security enhancement in full-duplex wiretap channels","authors":"Shihao Yan, Nan Yang, R. Malaney, Jinhong Yuan","doi":"10.1109/GLOCOMW.2014.7063614","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063614","url":null,"abstract":"We propose an antenna switching scheme in the full-duplex wiretap channel where the legitimate receiver, equipped with two antennas, operates in a full-duplex mode. We focus on a practical eavesdropping scenario where the instantaneous channel state information of the eavesdropper's channel is not available at the transmitter and the receiver. In our proposed scheme, the receiver selects the antenna that maximizes the main channel gain as the receive antenna and uses the remaining antenna to transmit jamming signals. We derive an exact expression for the secrecy outage probability to evaluate the secrecy performance of our new scheme. This expression allows us to quantify the secrecy performance gain of our proposed scheme relative to a standard antenna predetermination scheme where the receive and transmit antennas at the receiver are predetermined. We demonstrate that our scheme achieves a lower secrecy outage probability than the antenna predetermination scheme. We also show that our scheme achieves the full secrecy diversity order whereas the antenna predetermination scheme does not.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126489377","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An improved IMT-A GBSM MIMO channel model","authors":"Xueying Song, Xiaohu Ge, Jing Zhang, T. Han","doi":"10.1109/GLOCOMW.2014.7063513","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063513","url":null,"abstract":"The IMT-A geometry-based stochastic modeling (GBSM) channel model provides an accuracy and flexibility method for wireless channels evaluations in the telecommunication standards. However, it is a problem for practical engineering application considering the high calculation complexity of IMT-A GBSM channel models. To satisfy requirements from practical engineering applications, we proposed an improved IMT-A GBSM channel model for Urban micro-cellular scenarios. The improved IMT-A GBSM channel model is traded off by the calculation complexity and accuracy. Performance analysis results indicate that the calculation complexity of improved IMT-A GBSM channel model has been obviously reduced and correlation metrics of the improved IMT-A GBSM channel model still kept consistency with the traditional IMT-A GBSM channel model. Therefore, the improved IMT-A GBSM can be used for practical telecommunication engineering applications in UMi scenarios.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128788561","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A clustering approach for admission control and optimal beamforming in cognitive radio networks","authors":"D. Ciochina, M. Pesavento","doi":"10.1109/GLOCOMW.2014.7063595","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063595","url":null,"abstract":"We propose a computationally efficient approach to the problem of admission control and beamforming in a cognitive radio network scenario in which a secondary base station selects the largest set of users to be optimally served with required quality of service while minimizing the transmit power and respecting the interference thresholds imposed by a dense incumbent primary system. To reduce the complexity of the combinatorial user selection problem we propose an initial user clustering scheme in which the similarity between the long term spatial signatures of the users is assessed. Based on these clusters, the users to be simultaneously served, along with their optimal transmit powers and beamforming vectors, are selected according to their instantaneous spatial signatures using an iterative uplink-downlink algorithm. Numerical results show a significant reduction in complexity of our approach compared to previous techniques.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"75 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128805692","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Performance of FBMC Multiple Access for relaxed synchronization cellular networks","authors":"Jean-Baptiste Doré, V. Berg, D. Kténas","doi":"10.1109/GLOCOMW.2014.7063561","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063561","url":null,"abstract":"Relaxed synchronization and access to fragmented spectrum are considered essential for future generations of wireless networks in order to reduce physical channel signaling. Frequency Division Multiple Access for Filter Bank Multicarrier (FBMC) modulation provides promising performance without strict synchronization requirements contrary to conventional Orthogonal Frequency Division Multiplexing (OFDM). In this paper, the architecture of a FBMC receiver suitable for this scenario is considered and its performance is compared against OFDM. The maximum achievable capacity of an asynchronous uplink transmission is analyzed when limited amount of feedback information on timing misalignment and power control is available. The proposed receiver architecture based on frequency domain processing combined with the fair frequency localization of the FBMC prototype filter provides an architecture that allows for more efficient multiuser asynchronous reception compared to OFDM.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117195739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Using non-cooperative games to coordinate communications UAVs","authors":"P. Charlesworth","doi":"10.1109/GLOCOMW.2014.7063640","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063640","url":null,"abstract":"Swarms of communications-equipped UAVs offer a new approach to the provision of temporary wide-area communications for mobile radio systems. It is clear that coverage depends on the location of the UAVs in relation to the mobiles. Dynamically planning the location of UAVs in response to the movement of the mobiles can optimize the coverage of the network. This paper introduces the use of non-cooperative games as a technique for optimizing the location of UAVs. The game-theoretic approach requires that each UAV attempts to maximize its support of the mobiles, mindful of the activities of the other UAVs. This is analogous to several companies competing for their share in a limited market. The use of game theory recasts an optimization problem as a decision problem. The method described in this paper allows the UAVs to independently reach identical decisions about their future locations without the need for a central planning agent. Exemplar results are presented for a network of three UAVs. These are used to illustrate the behaviours that the UAVs exhibit during a game.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131202042","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Coordinated multi-robot exploration: Out of the box packages for ROS","authors":"Torsten Andre, Daniel Neuhold, C. Bettstetter","doi":"10.1109/GLOCOMW.2014.7063639","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063639","url":null,"abstract":"We present and evaluate new ROS packages for coordinated multi-robot exploration, namely communication, global map construction, and exploration. The packages allow completely distributed control and do not rely on (but allow) central controllers. Their integration including application layer protocols allows out of the box installation and execution. The communication package enables reliable ad hoc communication allowing to exchange local maps between robots which are merged to a global map. Exploration uses the global map to spatially spread robots and decrease exploration time. The intention of the implementation is to offer basic functionality for coordinated multi-robot systems and to enable other research groups to experimentally work on multi-robot systems. The packages are tested in real-world experiments using Turtlebot and Pioneer robots. Further, we analyze their performance using simulations and verify their correct working.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132692521","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Dynamic resource optimization with congestion control in heterogeneous cloud radio access networks","authors":"Jian Li, M. Peng, Y. Yu, Aolin Cheng","doi":"10.1109/GLOCOMW.2014.7063548","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063548","url":null,"abstract":"The heterogeneous cloud radio access networks (H-CRANs) are presented in this paper as a promising new paradigm for future heterogeneous converged networks. To maintain low traffic queue congestion and make the sum utility of average throughput arbitrarily close to the optimum, the dynamic optimization problem of traffic admission control, heterogeneous processing node (HPN)/remote radio head (RRH) association, resource block (RB) and power allocation subject to the average power consumption constraints of RRHs is formulated using the general framework of Lyapunov optimization. The optimization problem can be decomposed into three subproblems. To solve the third mixed-integer subproblem, the continuity relaxation is utilized and the optimality can be still preserved. Finally, the simulation results validate the out-performances of the proposed solution with appropriate control parameter.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134321483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Enhancing the DSRC reliability to allow the coexistence of VANET's applications","authors":"K. A. Hafeez, A. Anpalagan, Lian Zhao","doi":"10.1109/GLOCOMW.2014.7063643","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063643","url":null,"abstract":"The Dedicated Short Range Communication (DSRC) technology has been adopted by the IEEE community to enable safety and non-safety application for Vehicular Ad hoc Networks (VANETs). To better serve these two classes of applications, the DSRC standard divides the bandwidth into seven channels. One channel, called control channel (CCH) to serve safety applications and the other six channels, called service channels (SCHs) to serve non-safety applications. The DSRC standard specifies a channel switching scheme to allow vehicles to alternate between these two classes of application. The standard also recommends that vehicles should visit the CCH every 100ms, called Synchronization Interval (SI), to send and receive their status messages. It is highly desirable that these status messages be delivered to the neighbouring vehicles reliably and within an acceptable delay bound. It is obvious that increasing the time share of the CCH from the SI will increase the reliability of safety applications. In this paper, we will optimize the control channel access such that safety applications have a high successful transmission rate within their share of the SI interval. Moreover, a new algorithm, called Optimal Channel Access (OCA), will be introduced to enhance the performance of the DSRC while keeping the CCH I as small as possible. Hence non-safety applications will have a fair share of the DSRC bandwidth.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"139 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134560675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Multi-wavelength visible light communication system design","authors":"P. Butala, H. Elgala, T. Little, P. Zarkesh-Ha","doi":"10.1109/GLOCOMW.2014.7063486","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063486","url":null,"abstract":"Visible light communication (VLC) is achieved by modulation of one or more spectral components in the visible spectrum (≈380-780 um). The use of this range provides an opportunity to exploit an otherwise untapped medium that is used in human lighting. Most VLC systems constructed to date focus on using a broad visible band generated by phosphor-converted light emitting diodes, or by filtering to isolate the blue component from these sources. Multi-wavelength systems consider additional wavelength bands that are combined to produce the desired communications capacity and lighting output. This color combining, or mixing, realizes desired color temperature and intensity and represents a form of wavelength-division multiplexing. This paper investigates the relationships between the colors comprising the lighting source for a range of lighting states, the spectral separation of communication channels, the relative intensities required to realize lighting states, how modulation can be most effectively mapped to the available color channels, and the design of an optical filtering approach to maximize signal to noise ratio while minimizing crosstalk at the receiver. Simulation results based on a three colored VLC system are discussed using orthogonal frequency division multiplexing for each color. It is shown that the system is the most power efficient at 6250 K correlated color temperature, with transmitter spectral spread of 5 nm and filter transmittance width of 40 nm.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133095622","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Benjebbour, Anxin Li, Y. Kishiyama, Huiling Jiang, Takehiro Nakamura
{"title":"System-level performance of downlink NOMA combined with SU-MIMO for future LTE enhancements","authors":"A. Benjebbour, Anxin Li, Y. Kishiyama, Huiling Jiang, Takehiro Nakamura","doi":"10.1109/GLOCOMW.2014.7063515","DOIUrl":"https://doi.org/10.1109/GLOCOMW.2014.7063515","url":null,"abstract":"This paper investigates the system-level performance of downlink non-orthogonal multiple access (NOMA) combined with single user MIMO (SU-MIMO) for future LTE (Long-Term Evolution) enhancements. The goal is to clarify the performance gains of NOMA combined with SU-MIMO transmission, taking into account the LTE radio interface such as frequency-domain scheduling, adaptive modulation and coding (AMC), and NOMA specific functionalities such as multi-user pairing/ordering and transmit power allocation. In particular, we propose practical schemes to efficiently combine NOMA with open-loop SU-MIMO (Transmission Mode 3: TM3) and closed-loop SU-MIMO (Transmission Mode 4: TM4) specified in LTE. Based on computer simulations, we compare NOMA performance gains for different granularities of scheduling and MCS (modulation and coding scheme) selection, for both genie-aided channel quality information (CQI) estimation and approximated CQI estimation, and using different number of power sets. Evaluation results show that NOMA can still provide a hefty portion of its expected gains even with approximated CQI estimation and limited number of power sets, and also when LTE compliant subband scheduling and wideband MCS are applied.","PeriodicalId":354340,"journal":{"name":"2014 IEEE Globecom Workshops (GC Wkshps)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122677314","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}